CONTAMINATION IN THE AIR

By inhaling the ambient air, germs also enter the human organism. You can see the immense danger of Covid19.
 

On the one hand, yeast, mold and a wide variety of other bacteria and viruses are present in the air, on the other hand, human germs end up in the body, for example through the abrasion of skin particles (10 billion per person and day), and spread there quickly.
 

Similar to water, dirt and biofilms form in ventilation systems, in which pathogens can multiply rapidly.